#lang racket
(define (poly x y)
  (+ (expt 2 x) y)
  )


(define (my-divide n)
  (cond
    [(= n 0) 'inf]
    [else (/ 1 n)]
    )
  )

(define PRICE 5)
(define SALES-TAX (* 0.08 PRICE))
(define TOTAL (+ PRICE SALES-TAX))

(define (total price tax)
  (+ price (* price tax))
  )

; Test
(poly 3 5)
(total 12 0.08)